code: def _init_pathinfo():
      """Return a set containing all existing file system items from sys.path."""
      d = set()
      for item in sys.path:
          try:
              if os.path.exists(item):
                  _, itemcase = makepath(item)
                  d.add(itemcase)
          except TypeError:
              continue
      return d
  
imports: import sys
  import os
  import builtins
  import _sitebuiltins
  import io
label_desc: Use image node_id 5 for calling a global function with example usage: _init_pathinfo() and returns: d